Maria Helena Braga

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Maria Helena Braga
Maria Helena Sousa Soares de Oliveira Braga
MHB 2.jpg
NationalityPortuguese
Other namesM. H. Braga; M.H. Braga; M. Helena Braga; Helena Braga
EducationDoctor, Materials Science and Metallurgy
Alma materUniversidade do Porto
Known forBattery technology
Scientific career
FieldsMaterials Science, Physics, Thermodynamics
InstitutionsMaterials Science and Engineering Program and Texas Materials Institute-The University of Texas at Austin, Engineering Physics Department-University of Porto, Energy and Geology National Laboratory (LNEG), S. Mamede Infesta, Portugal

Maria Helena Sousa Soares de Oliveira Braga is an associate professor at the Engineering Physics Department of University of Porto, Portugal. [1] She is currently focused on research areas in Materials Science and Materials Engineering at University of Porto and University of Texas at Austin. [2] She is credited with expanding the understanding of glass electrolyte and glass batteries with colleague John B. Goodenough. [3] Braga is a senior research fellow in the Materials Institute headed by Goodenough.

Contents

Education

Braga was Licentiate in physics at Porto University, Portugal in 1993 and received Doctor of Philosophy from Porto University, Portugal, in 1999.

Research

Braga was Research Scholar and a Long Term Visiting Staff Member at Los Alamos National Laboratory (2008-2011). Braga is recognized for expanding our understanding of solid-glass electrolytes and glass-batteries. She has contributed research in light alloys, lead-free solders, and hydrogen storage materials. [4] [5] [6] [7] [8] Her work with glass electrolytes was recognized by Goodenough as important, and she was persuaded to join his group to further this research. [9]

Glass-amorphous solid electrolytes in the form of Ba-doped Li-glass and Ba-doped Na-glass are proposed by Braga as a solution to problems identified with organic liquid electrolytes used in modern lithium-ion battery cells. Sodium is easier to obtain and more environmentally friendly than lithium, and the glass electrolyte eliminates the possibility of short circuit. Batteries based on this new design may store three times as much energy as comparable Li-ion cells. [10] [11] In addition, designs based upon Bragas research improve the existing limitation of 500 charge cycles in Li-ion to over 1200 charge cycles and over a wider temperature range. [12] [13]

Helena Braga is the really force behind all of this.

Andrew Murchison, DesignNews

Braga and colleagues at Materials for Energy Research Group in University of Porto host research projects related to glass electrolyte, magnetic refrigerators, catalyst for fuel cell reactions, and other advanced materials research. [14]

Braga has submitted an application for a patent on a solid-carbon sodium ion based device for energy storage applications. [15]

Related Research Articles

<span class="mw-page-title-main">Lithium-ion battery</span> Rechargeable battery type

A lithium-ion or Li-ion battery is a type of rechargeable battery that uses the reversible intercalation of Li+ ions into electronically conducting solids to store energy. In comparison with other commercial rechargeable batteries, Li-ion batteries are characterized by higher specific energy, higher energy density, higher energy efficiency, a longer cycle life, and a longer calendar life. Also noteworthy is a dramatic improvement in lithium-ion battery properties after their market introduction in 1991: within the next 30 years, their volumetric energy density increased threefold while their cost dropped tenfold.

<span class="mw-page-title-main">Sodium–sulfur battery</span> Type of molten-salt battery

A sodium–sulfur (NaS) battery is a type of molten-salt battery that uses liquid sodium and liquid sulfur electrodes. This type of battery has a similar energy density to lithium-ion batteries, and is fabricated from inexpensive and non-toxic materials. However, due to the high operating temperature required, as well as the highly corrosive and reactive nature of sodium and sodium polysulfides, these batteries are primarily suited for stationary energy storage applications, rather than for use in vehicles. Molten Na-S batteries are scalable in size: there is a 1 MW microgrid support system on Catalina Island CA (USA) and a 50 MW/300 MWh system in Fukuoka, Kyushu, (Japan).

<span class="mw-page-title-main">John B. Goodenough</span> American materials scientist (1922–2023)

John Bannister Goodenough was an American materials scientist, a solid-state physicist, and a Nobel laureate in chemistry. From 1986 he was a professor of Materials Science, Electrical Engineering and Mechanical Engineering, at the University of Texas at Austin. He is credited with identifying the Goodenough–Kanamori rules of the sign of the magnetic superexchange in materials, with developing materials for computer random-access memory and with inventing cathode materials for lithium-ion batteries.

<span class="mw-page-title-main">Lithium metal battery</span> Non-rechargeable battery using lithium metal as anode

Lithium metal batteries are primary batteries that have metallic lithium as an anode. The name intentionally refers to the metal to as to distinguish them from lithium-ion batteries, which use lithiated metal oxides as the cathode material. Although most lithium metal batteries are non-rechargeable, rechargeable lithium metal batteries are also under development. Since 2007, Dangerous Goods Regulations differentiate between lithium metal batteries and lithium-ion batteries.

<span class="mw-page-title-main">Molten-salt battery</span> Type of battery that uses molten salts

Molten-salt batteries are a class of battery that uses molten salts as an electrolyte and offers both a high energy density and a high power density. Traditional non-rechargeable thermal batteries can be stored in their solid state at room temperature for long periods of time before being activated by heating. Rechargeable liquid-metal batteries are used for industrial power backup, special electric vehiclesand for grid energy storage, to balance out intermittent renewable power sources such as solar panels and wind turbines.

<span class="mw-page-title-main">Lithium–sulfur battery</span> Type of rechargeable battery

The lithium–sulfur battery is a type of rechargeable battery. It is notable for its high specific energy. The low atomic weight of lithium and moderate atomic weight of sulfur means that Li–S batteries are relatively light. They were used on the longest and highest-altitude unmanned solar-powered aeroplane flight by Zephyr 6 in August 2008.

<span class="mw-page-title-main">Electric battery</span> Power source with electrochemical cells

An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that will flow through an external electric circuit to the positive terminal. When a battery is connected to an external electric load, a redox reaction converts high-energy reactants to lower-energy products, and the free-energy difference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells; however, the usage has evolved to include devices composed of a single cell.

<span class="mw-page-title-main">Solid-state battery</span> Battery with solid electrodes and a solid electrolyte

A solid-state battery is an electrical battery that uses a solid electrolyte for ionic conductions between the electrodes, instead of the liquid or gel polymer electrolytes found in conventional batteries. Solid-state batteries theoretically offer much higher energy density than the typical lithium-ion or lithium polymer batteries.

A metal–air electrochemical cell is an electrochemical cell that uses an anode made from pure metal and an external cathode of ambient air, typically with an aqueous or aprotic electrolyte.

A potassium-ion battery or K-ion battery is a type of battery and analogue to lithium-ion batteries, using potassium ions for charge transfer instead of lithium ions. It was invented by the Iranian/American chemist Ali Eftekhari in 2004.

<span class="mw-page-title-main">Sodium-ion battery</span> Type of rechargeable battery

Sodium-ion batteries (NIBs, SIBs, or Na-ion batteries) are several types of rechargeable batteries, which use sodium ions (Na+) as its charge carriers. In some cases, its working principle and cell construction are similar to those of lithium-ion battery (LIB) types, but it replaces lithium with sodium as the intercalating ion. Sodium belongs to the same group in the periodic table as lithium and thus has similar chemical properties. However, in some cases, such as aqueous batteries, SIBs can be quite different from LIBs.

Research in lithium-ion batteries has produced many proposed refinements of lithium-ion batteries. Areas of research interest have focused on improving energy density, safety, rate capability, cycle durability, flexibility, and cost.

<span class="mw-page-title-main">NASICON</span> Class of solid materials

NASICON is an acronym for sodium (Na) super ionic conductor, which usually refers to a family of solids with the chemical formula Na1+xZr2SixP3−xO12, 0 < x < 3. In a broader sense, it is also used for similar compounds where Na, Zr and/or Si are replaced by isovalent elements. NASICON compounds have high ionic conductivities, on the order of 10−3 S/cm, which rival those of liquid electrolytes. They are caused by hopping of Na ions among interstitial sites of the NASICON crystal lattice.

<span class="mw-page-title-main">Kuzhikalail M. Abraham</span> Indian-American chemical engineer

Kuzhikalail M. Abraham is an American scientist, a recognized expert on lithium-ion and lithium-ion polymer batteries and is the inventor of the ultrahigh energy density lithium–air battery. Abraham is the principal of E-KEM Sciences in Needham, Massachusetts and a professor at the Northeastern University Center for Renewable Energy Technologies, Northeastern University, in Boston, Massachusetts.

The glass battery is a type of solid-state battery. It uses a glass electrolyte and lithium or sodium metal electrodes.

<span class="mw-page-title-main">Semi-solid flow battery</span>

A semi-solid flow battery is a type of flow battery using solid battery active materials or involving solid species in the energy carrying fluid. A research team in MIT proposed this concept using lithium-ion battery materials. In such a system, both positive (cathode) and negative electrode (anode) consist of active material particles with carbon black suspended in liquid electrolyte. Active material suspensions are stored in two energy storage tanks. The suspensions are pumped into the electrochemical reaction cell when charging and discharging. This design takes advantage of both the designing flexibility of flow batteries and the high energy density active materials of lithium-ion batteries.

Arumugam Manthiram is an Indian-American materials scientist and engineer, best known for his identification of the polyanion class of lithium ion battery cathodes, understanding of how chemical instability limits the capacity of layered oxide cathodes, and technological advances in lithium sulfur batteries. He is a Cockrell Family Regents Chair in engineering, Director of the Texas Materials Institute, the Director of the Materials Science and Engineering Program at the University of Texas at Austin, and a former lecturer of Madurai Kamaraj University. Manthiram delivered the 2019 Nobel Lecture in Chemistry on behalf of Chemistry Laureate John B. Goodenough.

A polymer electrolyte is a polymer matrix capable of ion conduction. Much like other types of electrolyte—liquid and solid-state—polymer electrolytes aid in movement of charge between the anode and cathode of a cell. The use of polymers as an electrolyte was first demonstrated using dye-sensitized solar cells. The field has expanded since and is now primarily focused on the development of polymer electrolytes with applications in batteries, fuel cells, and membranes.

<span class="mw-page-title-main">History of the lithium-ion battery</span> Overview of the events of the development of lithium-ion battery

This is a history of the lithium-ion battery.

Karim Zaghib is an Algerian-Canadian electrochemist and materials scientist known for his contributions to the field of energy storage and conversion. He is currently Professor of Chemical and Materials Engineering at Concordia University. As former director of research at Hydro-Québec, he helped to make it the world’s first company to use lithium iron phosphate in cathodes, and to develop natural graphite and nanotitanate anodes.

References

  1. Porto, Faculty of Engineering of the University of. "FEUP - Helena Braga". sigarra.up.pt. Retrieved 2017-05-06.
  2. "Maria Helena Braga at University of Texas at Austin | Government Salaries Explorer | The Texas Tribune". The Texas Tribune. Retrieved 2017-04-30.[ permanent dead link ]
  3. "Lithium-Ion Battery Inventor Introduces New Technology for Fast-Charging, Noncombustible Batteries". UT News | The University of Texas at Austin. 2017-02-28. Retrieved 2017-04-30.
  4. Braga, M. Helena; Ferreira, Jorge A.; Murchison, Andrew J.; Goodenough, John B. (2017-01-01). "Electric Dipoles and Ionic Conductivity in a Na+ Glass Electrolyte". Journal of the Electrochemical Society. 164 (2): A207–A213. doi: 10.1149/2.0691702jes . ISSN   0013-4651. S2CID   99087290.
  5. Braga, M.H.; Grundish, N.S.; Murchison, A.J.; Goodenough, J.B. (2016-12-09). "Alternative strategy for a safe rechargeable battery". Energy and Environmental Science . 10: 331–336. doi:10.1039/C6EE02888H.
  6. Labrini, Mohamed; Scheiba, Frieder; Almaggoussi, Abdelmajid; Larzek, Mohamed; Braga, M. Helena; Ehrenberg, Helmut; Saadoune, Ismael (2016-06-01). "Delithiated LiyCo0.8Ni0.1Mn0.1O2 cathode materials for lithium-ion batteries: Structural, magnetic and electrochemical studies". Solid State Ionics. 289: 207–213. doi:10.1016/j.ssi.2016.03.017.
  7. Braga, M. Helena; Murchison, Andrew J.; Ferreira, Jorge A.; Singh, Preetam; Goodenough, John B. (2016-03-09). "Glass-amorphous alkali-ion solid electrolytes and their performance in symmetrical cells". Energy Environ. Sci. 9 (3): 948–954. doi:10.1039/c5ee02924d. ISSN   1754-5706.
  8. "Revolutionizing Batteries With Sodium" . Retrieved 2017-04-30.
  9. Kennedy, Pagan (2017-04-07). "To Be a Genius, Think Like a 94-Year-Old". The New York Times. ISSN   0362-4331 . Retrieved 2017-05-06.
  10. "Lithium-Ion Pioneer Introduces New Battery That's Three Times Better". Fortune. Retrieved 2017-05-06.
  11. "The Inventor of the Lithium-Ion Battery Invents an Even Better One". Popular Mechanics. 2017-03-03. Retrieved 2017-05-06.
  12. "Could this be the battery that revolutionizes our cars and phones?". NBC News. Retrieved 2017-05-06.
  13. "Lithium-Ion Battery Inventor Ups Ante With Advanced Solid-State Rechargeable". Design News. 2017-05-23. Retrieved 2017-05-27.
  14. "Physics_MATERIALS". paginas.fe.up.pt. Retrieved 2017-05-05.
  15. Sousa, Soares De Oliveria; Do, Amral Ferreira José Jorge; Murchison, JR Andrew Jackson; Braga, Maria Helena (October 6, 2016). "An electrochemical solid carbon-sulfur na-ion based device and uses thereof" (WO2016157083 A1). European Patent Office . Retrieved 2017-05-31.{{cite journal}}: Cite journal requires |journal= (help)